package informationHW;

public class FloatDoubleExer {
    public static void main(String[] args){
        double pai = 3.14;
        double r1 = 1.2;
        double r2 = 2.5;
        int r3 = 6;
        System.out.println(pai * r1 * r1);
        System.out.println(pai * r2 * r2);
        System.out.println(pai * r3 * r3);
    }
}
